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I was hoping for a simple solution for you. ?The possibilities are many now. ?So it’s hard to know what to tackle next without scoping some of the signals. if you do send it for a Cape Cod

My experience with Jeff was very positive. Dave K9SW

Tim, it's possible that a protection diode on one of the buck converter power supply boards has done it's job. You can replace the diodes, or buy new boards from QRP Labs, but if you aren't

Thanks! To me it also looks like they have a different shape (with the shinier ones having more of a rounded curve), but it could be an optical illusion.

I'd open a ticket that Hans will address when he gets back from vacation: https://qrp-labs.com/support/

You have it correct.? ?The "shiny" black toroids are coated with a glossy lacquer, but they do this by spraying while the toroid is laying flat, so one side of it is still flat black.? The "dull"

Right. It's a bit tricky to really tell which "black" toroids are dull and which are shiny. I think I have it right though.

This is because it is the only QMX screen that scrolls. This is a holdover from ancient times (1970's) when physical terminals had 80 cols and 24 rows, including a ubiquitous one called VT100.? The

If you are hardly getting any power out then the reason for distortion and only hearing peaks of voice is the dead zone Hans built into the QMX SSB in order to get the two-tone signal to pass through

My assembled QMX+ arrived from QRP Labs on Monday 24 March and today I have a problem. I powered the rig on and keyed my paddles, but heard only one dit before an 'S' displayed on the screen (high

I built several of the original ones, you should be good. Build it.

That’s what came with the kit. Just follow the instructions.

Good Day, Inquiring as I read somewhere in all my reading on here that some of the original QCX classic kits had different cores and where replaced to include "better" maybe cores later on. I bought

Took a deep breath and removed C504. It measures about 500 uf so this cap is fine. No problem re-installing it. Other than my shaky hands! I did find an interesting thing while doing the testing. I

It sure is! However it's useful for other stuff, and then I only need one console application. :) Fortunately for me, securecrt is not the problem. I believe I've gotten to the bottom of this thanks

Here my initial test of the audio,? sry in German :-) https://youtu.be/Xe_VNkaq-xk 73 Chris

The mic supplied with the FX4C works with the QMX, no adaptors required. The one Erik is making are prob better though. -- Compton VK2HRX Sydney, Australia

Frome the QMX SSB page at QRPlabs "All development has been done with this particular Electret microphone from Digikey, part number

Here's how microphone sensitivity is measured: https://www.analog.com/en/resources/analog-dialogue/articles/understanding-microphone-sensitivity.html A lower negative dB (such as -24dB) means more

Mic Output levels... The -44 db Spec is due to the modern digital devices today, so that the Mic doesn't overdrive the ADC/DAC, as used in most modern SDRs, as well as SmartPhones/Tablet/Notebook